The Uwell Crown V Tank is made of stainless steel and has been delicately polished to present a brilliant shine and a smooth touch. The Roman numeral "V" is embedded in the design of the top cap and airflow ring. The tank is top-filled, it also includes a silicone check valve to prevent unwanted e-liquid leaks. Press and turn a quarter to open. Along with the Crown V come the UN2 Meshed resistors, 0.23, 0.20 and 0.30ohm to obtain an experience to another level. One of the outstanding novelties compared to its previous versions is the patented Self-Cleaning Technology to reduce e-liquid leaks and the frequency of cleaning.